Set 840-TV

Thanks to RF wireless mobility, you can enjoy full-range, personalized audio from your entertainment system even from another room or outside. Easily adjustable settings for clear voice rendition.
$ 279.95
plus applicable sales tax – free shipping
Article No. 502013
★ ★ ★ ★ ☆ 4.5
2 Reviews


Set 840-TV is an RF stereo TV listening system that is ideally suited for wireless listening in your house or in your yard. Whether you are watching a TV program or listening to sophisticated classical music, Set 840-TV is sure to provide excellent sound.

Just the push of a button sets the device to your personal listening preferences, providing you with the enjoyment of speech that is easier to understand. The lightweight receiver is comfortable to wear because of its flexible ear pads. Ergonomic controls and visual feedback of certain operations make Set 840-TV easy to use. It can be connected directly to your TV, hi-fi system or radio.


  • Easy to set up and operate

  • Wireless mobility within a range of up to 100 m

  • Transmits even through walls

  • Ideal for plasma TVs

  • Excellent individual stereo sound

  • Three selectable hearing settings on the transmitter: optimized speech intelligibility due to switchable compression and treble emphasis

  • Treble emphasis can be set individually

  • Large, ergonomic volume control on the receiver

  • Balance control on the receiver for setting the volume for the right and left ear

  • Receiver automatically turns on/off when it is put on/removed

  • High degree of wearing comfort thanks to flexible earpads and low receiver weight

  • Lithium polymer battery technology ensures a long operating time of up to 9 hours

  • Receiver can be placed in the transmitter's charging compartment facing in either direction

  • Three selectable transmission channels on the transmitter for optimum reception

  • Auto-tuning - automatic channel search tuning can be activated on the receiver

  • Integrated charging compartment in transmitter for spare battery

What's in the box?

  • 1 RR 840 stethoset receiver
  • 1 TR 840 transmitter
  • 1 BA 300 battery
  • 2 pairs of replacement earpads
  • 1 main power supply with national adapters for EU, UK
  • 1 TV RCA adapter
  • 1 TV SCART adapter
  • 1 TV connection cable with two 3.5 mm stereo jack plugs and one adapter to 1/4" (6.3 mm) jack socket

Technical Data

  • Wearing style
  • Color
  • Dimensions
    Receiver: 240 x 128 x 26 mm
  • Dimensions
    Transmitter: 112 x 146 x 58 mm
  • Frequency response
    50 - 16000 Hz
  • THD, total harmonic distortion
    < 1 % (1 kHz)
  • Weight
    Receiver: ~ 68 g
  • Weight
    Transmitter: ~ 260 g
  • Charging time
    ~ 3 h
  • Range
    up to 100 m
  • Microphone connector
    3,5 mm, same plug as Audio-XLR connector
  • Signal-to-noise ratio
    70 dB(A)
  • Operating time
    Receiver: approx. 9 h
  • Modulation
    FM, stereo
  • Carrier frequencies
    863,3 / 864.0 / 864,7 MHz
  • Max. Sound pressure level (active)
    125 dB
Reviews (2)
4.5 of 5 ★ ★ ★ ★
  • Sonny
    Leander Texas
    This has been outstanding!

    I had to rearrange the wiring and came get everything connected correctly?






    TV help


    I would recommend this to a friend.

  • Kajolt
    Townsville Queensland
    Comfortable to wear, good for hard of he

    A great device for elderly with hearing aids/hearing impaired. Thought it was very comfortable, good sound, with microphone attachment to back of TV/Radio the noise in room can dominate sound. Had to buy a $100 part so that it could attach to digital TV. otherwise it was analog. Since then High quality sound, volume on headset is considerably lower. Great results, maybe they should think of putting digital converter incorporated in headset.


    Lightweight, Great Sound, Good Bass, Comfortable


    Needs Cable For Digital T, Not Good For Digital Tv


    Home Audio


    I would recommend this to a friend.


  • Can I use my Set 840 Assistive Listening System outside of the United States?

    Sennheiser does not recommend using a product outside of it's intended country of sale/use because different versions of products exist to comply with specific rules and regulations of specific countries. These rules and regulations are determine by the individual countries. If a product that is sold in the United States is intended for use outside of the United States it is the responsibility of the user to check regulations for other countries to ensure that the product remains compliant with the law of the country of use.

    Please be aware that the Set 840 System is a radio frequency model headphone and rules and regulations about which frequencies can be used change from country to country and it is the government of the respective country that creates these regulations. For this reason Sennheiser manufacturers different models using different frequency ranges for different parts of the world. The Set 840 models sold in the United States operate at 926-928 Mhz range and are designed to comply with the regulations determined by the United States Government.

    Furthermore the power supplies for products are optimized for the country that the product will be used in. With the use of an adapter the power supply should work outside of the intended country of use however if the power supply is used outside of the intended country of use it is not running optimally and the potential for the circuitry to wear out more quickly is much higher.

    Set 840 TV ( #502013 )
  • How do I add an additional headset to the Set 840 Assistive Listening System?

    The Set 840 Assistive Listening system is made up of two main components - the transmitter (TR 840) and the headset (RR 840). Headsets can be purchased individually but transmitters are not available individually. To expand a system to have multiple headsets there are couple of options when adding extra headsets to the system.

    1) Purchase an additional headset (RR 840) and tune the headphones into the existing base station. NOTE: The transmitter can charge one headset at a time and has a slot for an extra battery so the battery would need to be removed from the second headset and placed in the spare battery charging slot.

    2) Purchase a second complete system (Set 840) and tune the headphones into the existing base station and then use the second transmitter only as a charging station.

    3) Purchase a second complete system (Set 840) and have both base stations set up and transmitting on separate channels. NOTE: This option would generally only be used when different audio sources are in use and then it is a matter of tuning the headphones to the appropriate base station to pick up the audio signal that is desired. The channel switch is a small black switch on the back of the base station.

    This diagram shows the scenario with one base station transmitting to multiple headphones and the scenario with three different base stations connected to different audio sources transmitting to different headphones. NOTE: In the second scenario to change a headphone from receiving from base station 1 to receiving the signal from base station 3 it is simply a matter of pressing the channel button on the receiver until the signal from the desired base station is picked up.

    NOTE: Since the Set 840 is a radio frequency (RF) system the number of headphones that can be added is unlimited and the only requirement is that the headsets are in range of and tuned into the transmitter.

    Set 840 TV ( #502013 )
  • How do I charge the headset of the Set 840 Assistive Listening System?

    The GREEN light on the front of the base near the bottom indicates that an audio signal is present. This light will go on and off depending on whether an audio signal is present. NOTE: The base can still charge the battery in the headset even if an audio signal is not present and hence this light is off.

    The crucial light to indicate that the battery is charging is the light directly below the Sennheiser name as this light indicates that charging is taking place. If the headset is not in the charging cradle this light will remain unlit. If the headset is in the charging cradle and the battery is charging then the light will be RED. Once the battery is charged the light will turn GREEN. 

    NOTE: The headset of the Set 840 S and Set 840 TV look different but the concept is the same.

    NOTE: If the charging light is not coming on when the headset is in the charging position then re-position the headset to ensure that there is no debris (ie: dust, lint, etc) on the contact points of the battery and charging cradle, ensure that there is good contact between the battery and charging cradle and check the power source to ensure it is active.

    Set 840 TV ( #502013 )
  • How do I fine tune my Set 840 Assistive Listening System for the best audio?

    There are a series of adjustments on the Set 840 that can be done to adjust the audio to enhance the listening experience.
    On the transmitter:
    - Switch for Mono/Stereo = STEREO mode is different audio signals (ie: Left and Right) to each ear and MONO mode has a mixed signal (ie: Left and Right combined) that is the same sound going to both ears.
    - Speech Intelligibility Buttons = Boosts for low/medium/high frequencies (or can be turned off) for increased audio intelligibility.
    - Treble adjustment control = Adjusts treble however it is recommended to only be done by a hearing expert.
    On the receiver:
    - Balance Control = Controls how much volume each ear gets
    NOTE: All of these adjustments are done assuming that the audio signal getting to the transmitter is a good clean signal. The transmitter/receiver is set to the specific frequencies so no fine tuning for frequencies is needed. If it is an issue like static in the audio then either change the transmitter channel (frequency) or check the audio source for signal issues or check for external influences that could cause the issue.

    Set 840 TV ( #502013 )
  • How do I set up my Set 840 Assistive Listening System?

    The Set 840 wireless headset system can be connected via a 3.5 mm plug into a dedicated headphone jack (which will often cut sound to the external speakers) OR to the RED & WHITE RCA audio output jacks (often found on the back of the TV, cable box, receiver, DVR, etc) and when connected in this manner they will allow for operation of both the headphones and the external speakers.

    The first step is top connect the transmitter (base station) to power and the second step is to connect the audio cable to the audio source. When the audio cable is connected to an audio source that is turned on the first thing to check is that the GREEN light on the front of the transmitter (base station) comes on. This indicates that the unit has both power and is transmitting audio. Once this GREEN light comes on it is simply a matter of tuning the headphones into the right frequency. You do this by pressing the channel button on the back of the receiver. You may need to do this a couple of times. If the receiver does not pick up the audio transmission once you have pressed the channel button on the receiver you may need to try a different transmission channel. To try a different transmission channel you need to locate the channel button on the back of the transmitter and select a different channel. There are 3 options so be sure to try them all.

    If the GREEN light doesn't come on or comes on and then goes away when the transmitter is plugged into both a power source and an audio source then it means that the audio signal is is too low (or not getting to the transmitter at all). The transmitter needs a nice, loud signal to work with or the internal electronics will shut off within 5 minutes if no/very little volume is detected to conserve battery life. The signal level needs to be increased before reaching the transmitter. This can be accomplished by turning up your source on variable-level outputs (TV Volume) or by increasing the signal from a fixed-level output (increasing the output level to the audio output jacks which is done through the TV set up options). Try increasing it in small increments to prevent overload which results in distortion. Also check to see that you are connected to outputs and not inputs. You may also try to connect to a cable box (or DVR, HD receiver, etc) and its audio outputs or through a headphone plug.

    The other lights that appear on the transmitter (base station) are the battery charging indicator lights. There is one light to indicate charging when the headset is in the charging cradle and one light to indicate charging if a battery is in the side charging slot. These lights will light up RED when the battery is charging and turn GREEN when the battery is fully charged.

    There are three lights are on the left hand side of the transmitter (base station) and these indicate the frequency boost functions. If the frequency boost function is not activated then no light will appear. If the frequency boost function is activated then the light will appear to indicate which level (low frequencies, mid range frequencies or high frequencies) is being boosted. To change from one level to another simply push the frequency boost button.

    NOTE: If there is no analog audio output available on your audio source and the only option for connecting the headphones is a digital audio output then a digital to analog decoder would be needed to connect to the digital output to change the digital signal to an analog signal for the headphones to use. A good digital to analog decoder is the OREI DA 34 (

    Set 840 TV ( #502013 )
  • What do I do if the volume control of the Set 840 has stopped working?

    On the front of the receiver (the part that you wear) is a large black volume dial. This large dial acts like a "cog" and turns a smaller internal volume dial. In a scenario where the volume control of the Set 830 or Set 840 does not appear to be functioning correctly it may be a situation where the dials are out of alignment.

    The solution is to realign the dials. To do this follow these steps:

    Step 1: Remove the large black dial. (It pops straight off).

    Step 2: Turn the volume all the way down by adjusting the small internal dial. (The small dial is grey colored and about the size of a dime).

    Step 3: Re-align the large black dial with the "0" just to the RIGHT of the "12 o'clock" position and click it back into place.

    Step 4: Test the volume.

    Step 5: You're all set.

    Set 840 TV ( #502013 )
  • What is the transmission range of my Set 840 Assistive Listening System?

    As an industry standard the range of wireless headphones is measured "line of sight" (headphones from transmitter) as it is the only way for all manufacturers to measure the range in an equal manner.

    While the wireless Radio Frequency (RF) signal can pass through obstacles (like walls) ultimately range will be affected (likely reduced) by passing through these obstacles and the more dense the obstacle the greater the effect will be on the signal. For example a signal passing through a glass window won't be affected very much whereas a signal passing through a concrete wall will be effected much more greatly.

    To increase range Sennheiser recommends trying to increase the audio output signal of the audio device that you have the transmitter connected to. Also try to but some space between the transmitter and other electronic devices, metal shelving, etc

    Set 840 TV ( #502013 )


  • Spec Sheets
  • EU Declaration of Conformity
    • EC Declaration of Conformity (690 KB) Download

  • Instruction Manual
    • Instruction manual Set 840-TV (1000 KB) Download

      Version 03/16

  • High Resolution Images
  • Transport information for Lithium-Ion batteries
    • Transport information for Lithium-Ion batteries (470 KB) Download

      Revision Date: 2020-02-09 Revision Number: 1.0

WARNING (for California residents only): This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects and other reproductive harm. For more information go to: